참고문헌
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G. Enestrom, Remarquee sur un Theorem relative aux racinnes de I'equation
$a_{n}z^{n}+a_{n-1}z^{n-1}+...a_{1}+a_{0}$ ou to us les coefficients sonts reels et possitifs, Tohoku Math. J., 18(1920), 34-36. - M. Marden, The Geometry of polynomials, Amer. Math. Monthly, 83(10)(1997), 788-797. https://doi.org/10.2307/2318685
- Q. G. Mohammad, On the zeros of the polynomials, Amer. Math. Monthly, 72(6)(1965), 631-633. https://doi.org/10.2307/2313853
- S. Kakeya, On the limits of the roots of an algebraic equation with positive coefficients, Tohoku Math. J., 2(1912-13), 140-142.
- E. C. Titchmarsh, The theory of functions, 2nd ed. Oxford Univ. Press, London, (1939).